The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 2010
Filed:
Jan. 31, 2006
Rumiko Kakehi, Yokohama, JP;
Rumiko Kakehi, Yokohama, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A medium having stored thereon a digital signature program used to cause a digital signature generating computer to function as: a digest generation unit which generates a digest from each of a plurality of messages; a collective signature generation unit which generates a single signature, as a collective signature, to be collectively affixed to the digests of the plurality of messages; an additional information generation unit which generates, for one of the plurality of messages, additional information including the collective signature, and information about other message for which the collective signature is generated; and a transmission unit which adds the additional information to the one of the plurality of the messages, and transmits the message to a signature verifying computer for verifying a signature.